Spinning-spindle.



N0. 768,074. PATENTED AUG. 23,1904.

' J. E. PREST.

SPINNING SPINDLE.

APPLICATION FILED JUNE I6, 1904.; .10 MODEL.

UNITED. STATES Patented August '23, 1904.

PAT NT OFFICE.

SPINNII'NG-SPINDLE.

SPECIFICATION forming part of Letters Patent No. 768,074, dated. August 23, 1 904.

Application filed June 16, '1904.

nected with and rotated by the spindle the operation of centrifugal action upon a clutching or engaging mechanism intermediate of the bobbin and the spindle.

In this invention the clutches or engaging devices are pivotally sustained in substantially I vertical positions between the spindle and the bobbin, and when motion is imparted to the spindle they are rotated horizontally on their axes by the centrifugal action produced by.

the rotation of thespindle or by said centrifugal action aided by atmospheric resistance until the outer edges of said clutches are thereby brought into contact with the walls of the chamber in the head of the bobbin, the

clutches being when in such contact inan-approximately tangential position or a position which is intermediate of a tangential and a radial position, butnot a radial one, with the effect that the outer or advancing corners of the clutches engage the bobbin and impart rotation thereto.

The nature of the invention is fully described below, and illustrated in the accompanying drawings, in which- Figure 1 is a view in elevation ofv a portion of a spindle embodying my invention and a longitudinal sectional view of a bobbin in position thereon. Fig. 2 is an enlarged section taken on line 2 2, Fig. 1. Fig. 3 is an enlarged view in elevation of one of the clutching-blades removed. Fig. a is a section taken on line 4: i, Fig. 3.

Similar letters of reference indicate corresponding parts. v

0; represents aspindleof ordinary construction provided with the rigidly-attached whirl b, from which there extends upward the sleeve 0, broadened at its upper end into or provided rigidly with the annular platform cl, on which rests the head of the bobbin 6.

Serial N0. 2I2,'755. (No model.)

At a distance above the platform d, near the front of the upper end of the chamber in the bobbin, a

collar g is rigidly secured to and around the spindle. Pivotally sustained in vertical positions between the'annular platform d and the collar 9 and between the spindle and the walls of the head of the bobbin are the clutchingblades 71, whose upper and lower pivot-pins 70 extend, respectively, into suitable sockets in the collar and platform. These pivot-pins are so placed as to bring the axial or'pivotal line decidedly toward one of the vertical edges of the blade, and the edge lettered m, which is that edge which is nearer the axial line, is preferably provided with a small extehsion or projection n.

It will be seen by reference to the drawings that the greater portion of each blade (all being preferably alike) is that which is next the edge opposite the edge at, but that the projectionn is long enough to prevent the blade from making a complete rotation, as before the completion of the rotation the said proj ection will strike the spindle. Moreover, even before the projection 72. struck the spindle the outer edge of the blade would come in contact with the walls of the chamber in the head of the bobbin. The blades are all disposed so that asthey lie in an approximately tangential position with relation to-the spindle. They all point in circle.

When rotation is imparted to the spindle, the outer and broader portions of the clutching-blades it swing outward by reason of the rotation of thebl ad es produced by centrifugal action until the outer edges come in contact with the walls of the bobbin-chamber. As the portions of the blades on the outer side of their pivots exceed in breadth the distance in the same direction around the a radial line between the pivots and the walls of the bobbin-chamber, said outer edges come incontact with said walls before the blades can reach a radial positiomand said blades when in contact with the bobbin are therefore in an approximately tangential position or in a position which is between atangential one and a radial one. Moreover, the portions of the blades which thus come in contact with the bobbin are the corners p, and the bobbin is engaged by said corners, which, having a tendency to dig into the walls of the bobbinchamber, impart rotation to the bobbin and continue to engage it even when the spindle is rotating quite slowly. I prefer to thicken these blades at their outer ends at s in order that their outward swing may be more positive and steady.

The outer edges of the blades next the engaging corners p are represented as being at substantially right angles with their sides; but this may not necessarily be rigidly adhered to. It is advisable, however, that the engaging corners should be at a right angle or an acute angle rather than an obtuse angle, as engagement made by such a shape is much more positive and -will continue longer when the spindle is slowing down than a frictional engagement by any surface which is approximately or quite parallel with the walls of the bobbin-chamber.

It will be observed by reference to Fig. 2 not only that the greater area of the blades is beyond or outside their pivotal or axial lines, but that the portion at istoo narrow to come in contact with the spindle when the bobbin is in position, as if it came into such contact with the outer edges it would not be free to make a full engagement with the bobbin. The object of the portions 12. is to keep the blades in the same direction when the bobbin is not in position, so that the edges 32 of all the blades will engage the bobbin. In order to accomplish this, the portion a must extend farther than the distance in a radial line between the pivot and the spindle.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. A rotatable spinning-spindle; a collar rigid on said spindle; a removable bobbin adapted to fit over said collar; and clutchingblades pivotally supported between the spindle and the bobbin, said blades being of such a width that whenrotation is imparted to the bobbin the outer edges of the blades will swing by centrifugal force into engagement with the bobbin without reaching a radial position, thereby making non-radial connection between the spindle and the bobbin.

2. A rotatable spinning-spindle; 'a collar rigid on said spindle; a removable bobbin adapted to fit over said collar; and clutchingblades pivotally supported between said spindle and bobbin, said blades being when the bobbin is at rest confined within the limits of the circumference of the collar, and when rotation is imparted to the bobbin swinging by centrifugal force beyond the edge of the collar into engagement with the bobbin, thereby making connection between the spindle and the bobbin.

3. A rotatable spinning-spindle; a removable bobbin; and clutching-blades pivotally supported between the spindle and the bobbin and being thickened or made heavier at their outer edges, the axes of the blades being noncoincident with the axis of the spindle, whereby the rotation of the spindle swings the blades into non-radial engagement with the bobbin.

4:. In a rotatable spinning-spindle, a series of clutching-blades it pivotally supported between the spindle and the bobbin, the axes of the said blades being substantially parallel with that of the spindle and nearer one of the vertical edges of the blades than the other, and the said blades being provided on the edge which is nearer the axis with the projections a, for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN E. PREST.

Witnesses:

HENRY W. WILLIAMS, A. K. H001). 

